Valve-gear for revolving-cylinder internal-combustion motors.



B. D. & W. E. SCOTT & W. W. FEET.

VALVE GEAR FOR REVOLVING CYLINDER INTERNAL COMBUSTION MOTORS.APPLICATION FILED JUNEBO, 1911.

1,058,472. Patented Apr. 8, 1913.

v cULUIAIIA PLANOGRAPN (20.. WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

BATEMAN DAVID SCOTT, WILFRED EDWARD SCOTT, AND WILLIAM WENTWORTH FEET,0F GLOUCESTER, ENGLAND.

VALVE-GEAR FOR REVOLVING-CYLINDER INTERNAL-COMBUSTION MOTORS.

To all whom it may concern:

Be it known that we, BATEMAN DAVID Sco'r'r and WILFRED EDWARD Soo'r'r,subjects of the King of Great Britain, and residents of Ansela House,Parliament street, Gloucester, England, and WILLIAM WnNTwoR'rH. Pour, asubject of the King of Great Britain, and a resident of Varni, ElmbridgeRoad, Gloucester, England, have invented new and useful Improvements inor Belating to Valve-Gear for Revolving-Cylinder Internal-CombustionMotors, of whlch the following is the specification.

This invention relates to valve gears and has for its object to providea means of operating the tappet rods of four stroke cycle internalcombustion rotary motors directly by means of a rotatable toothed ringwithout the employment of 2 to 1 gears or followers to neutralize theside thrust given by the cam to the tappet rods. These motors areusually provided with an odd number of cylinders, five or seven beingthe more frequent numbers. The cylinders are usually fired in thefollowing rotation, viz: l, 3, 5, 7, 2, 1, 6, 1 and so on.

In order that the invention may be more readily understood and carriedinto practical effect, reference is made to the accompanying drawingswherein Figure 1 represents in elevation a valve gear for a sevencylinder rotary motor. Fig. 2 is a section on line X of Fig. 1. Figs. 3,1 and 5, represent respectively the end of a tappet rod, the screw nutused to adjust same and the lock nut to secure the said screw nut. Fig.6 represents a valve gear for a five cylinder rotary motor.

In carrying out the invention an lnternally toothed ring A, and anexternally toothed ring B are provided, the teeth 6 of the ring B beingadapted to mesh with the teeth a of the ring A, but are widely spaced sothat the distance from tooth to tooth of ring B is double that of ringA. It is preferable to have three times the number of teeth in the ringA, as there are tappet rods to be operated, it is also convenient to letthe number of teeth in ring A be equal to double the number of the teethin ring B plus 1 as in Fig. 6, or plus 3 as in Fig. 1. Othercombinations are however suitable for the gear.

The ring A is pierced between every third tooth with holes radiatingfrom the center Specification of Letters Patent.

Application filed June 30, 1911.

.Patentedi1pr.8,1913.

Serial No. 636,247.

of the ring, and is secured to the crank case C concentrically with itby means of bolts or screws a The ring B is provided with a ball journalbearing 6 the inner race of which 6 is mounted eccentrically on thestationary main shaft D of the motor, by any suitable means, so that theteeth 6 engage with the teeth a of the ring A. The heads 0 of the tappetrods E are loosely inserted in the holes a and are adjusted by means ofscrew nut-s e secured by lock nuts 6 When the motor is rotated, the ringA causes the ring B to revolve on its bearing 6 every second tooth ofthe ring A engaging with every consecutive tooth of the ring B so thatas the tappet rods are three teeth apart every alternate tappet rod isactuated by every third tooth of the ring B, and as the number of tappetrods is odd, they are operated in the rotation of 1, 3, 5, 7, 2, 4, 6,and so on, that is each tappet rod is operated once in every tworevolutions of the crank case.

Acap F may be provided fitting over the gear to exclude dust. The gearis of course adaptable to engines having other suitable number ofcylinders and is not restricted to the seven or five cylinderarrangement shown.

What we do claim as our invention and desire to secure by Letters Patentis 1. In an improved valve operating gear for rotary cylinder fourstroke internal combustion engines, an internally toothed ring, meansfor mounting the ring concentrically with the cylinders, an externallytoothed ring adapted to operate within the inter nally toothed ring,means for mounting the externally toothed ring eccentrically withrelation to the internally toothed ring, and a valve rod operated by theteeth of the externally toothed ring.

2. In an improved operating gear for rotary four stroke internalcombustion engines, an internally toothed ring, a plurality of valverods spaced at intervals around and radially slidable through saidtoothed ring, an externally toothed ring, means formounting theexternally toothed ring eccentrically with relation to the internallytoothed ring, means for rotatably mounting the internally toothed ring,the teeth of the externally toothed ring intermeshing with the teeth ofthe internally toothed ring and engaging and actuating the valve rods.

'teeth of the externally toothed ring, whereby said valve rods areactuated.

4. In an improved valve operating gear for rotary internal combustionengines the combination of an internally toothed Wheel, an externallytoothed wheel for engagement with the teeth of the internally toothedwheel, a stationary eccentric on which the externally toothed wheel isrotatable, means for mounting the internally toothed wheel in operativerelation to the externally toothed wheel, and valve rods reciprocallyand radially mounted in the internally toothed wheel and projectingtherethrough, actuated by the teeth of the externally toothed wheel.

BATEMAN DAVID SCOTT.

VILFRED EDWARD SCOTT.

VILLIAM lVENTWORTI-I PEET.

lVitnesses:

E. J. BUssELL, L. L. HILoY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

